17 of Hollywood's Biggest Star Breakups of 2018

From Cardi B and Offset to Ariana Grande and Pete Davidson, a list of significant splits this past year.

Cardi B and Offset

Prince Williams/WireImage)

2018 was a notable time for new unions — the Royal Wedding, Nick Jonas and Priyanka Chopra — but this year has also seen its fair share of breakups.

Jennifer Aniston and Justin Theroux announced their separation way back in February, while just this month, Cardi B revealed that she and husband Offset had split. Even longtime couples, such as Robert De Niro and Grace Hightower and musicians Cassie and Diddy, have chosen to end their relationships.

Below, The Hollywood Reporter recaps all the major breakups that happened in 2018.

Justin Theroux and Jennifer Aniston

Jennifer Aniston and Justin Theroux

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The pair, who wed in 2015, announced their split in February of 2018, after more than seven years of partnership. The Leftovers star Justin Theroux said in a New York Timesprofile several months after that "it was kind of the most gentle separation, in that there was no animosity."

Lena Dunham and Jack Antonoff

Lena Dunham and Jack Antonoff

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Girls creator Lena Dunham detailed her breakup with musician Jack Antonoff in a piece written for Vogue in May. She wrote about seeking solitude near the end of their six-year relationship and how their "obsessive connection had turned to blind devotion."

Following the breakup, Antonoff was rumored to have been seeing singer Lorde, which both of them have since denied.

Channing Tatum and Jenna Dewan Tatum

Channing Tatum and Jenna Dewan

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Channing Tatum and Jenna Dewan first met on the set of 2006's Step Up, married in 2009 and had a daughter several years later. They announced in April that they would be separating and shared in a joint statement, "Absolutely nothing has changed about how much we love one another, but love is a beautiful adventure that is taking us on different paths for now."

Since then, Tatum has begun dating British singer Jessie J, while Dewan has been linked to actor Steve Kazee.

Chris Evans and Jenny Slate

Jenny Slate and Chris Evans

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Chris Evans and Jenny Slate have had an on-again, off-again relationship since first meeting each other while filming 2017's Gifted. They broke things off for good less than a year after, but Slate gushed about the Captain America actor's "golden-colored" heart in an interview with Vulture, citing Evans' fame as a likely factor in their split: “If you are a woman who really cares about her freedom, her rights, her sense of being an individual, it is confusing to go out with one of the most objectified people in the entire world."

Selena Gomez and Justin Bieber

Selena Gomez and Justin Bieber

Jamie McCarthy/Getty Images; Shareif Ziyadat/Getty Images

The Justin Bieber and Selena Gomez saga has gone on for quite some time, but "Jelena" seems to have officially ended in March. Just a few months after, Bieber confirmed his engagement to model Hailey Baldwin and the two secretly tied the knot in September, according to People.

Ariana Grande and Mac Miller

Mac Miller and Ariana Grande

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Ariana Grande paid tribute to her ex-boyfriend Mac Miller, who died in September, in a video posted to Instagram captioned, "I adored you from the day I met you when I was nineteen, and I always will. I can’t believe you aren’t here anymore. I really can’t wrap my head around it."

Grande and Miller broke up in May, and the pop singer also honored the late rapper in her single, "thank u, next": "Wish I could say, 'Thank you' to Malcolm, 'cause he was an angel," she sings in the opening lines.

G-Eazy and Halsey

G-Eazy and Halsey

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G-Eazy and Halsey collaborated on the song "Him & I" in the latter half of 2017 and began dating shortly after. The couple first broke things off in July of 2018 before reuniting again at the VMAs — then in October, their relationship officially came to an end.

Liam Payne and Cheryl Cole

Liam Payne and Cheryl Cole

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Former One Direction crooner Liam Payne and singer Cheryl Cole, who have a son named Bear, announced their split in July. Cole, who was actually a judge on The X Factor when Payne auditioned in 2008, rebuked rumors that Payne had cheated on her during their relationship.

Cassie and Diddy

Cassie Ventura and Sean "Diddy" Combs

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Music powerhouses Cassie Ventura and Sean "Diddy" Combs first went public with their relationship in 2012. After a couple breakups, the two officially split this year, though they were seen reuniting after the death of model and actress Kim Porter, the mother of three of Combs' children.

Sam Smith and Brandon Flynn

Brandon Flynn and Sam Smith

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The 13 Reasons Why star and "Too Good at Goodbyes" singer's nine-month romance came to an end over the summer. The two, who have attended the Grammys together, purged most photos of each other from their Instagram accounts post-split.

Brooklyn Beckham and Chloe Grace Moretz

Brooklyn Beckham and Chloe Grace Moretz

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Chloe Grace Moretz and Brooklyn Beckham made their first public appearance together as a couple at the premiere of Moretz's film Neighbors 2: Sorority Rising in 2016. They called it quits a couple years later sometime in April 2018, the same month Beckham was photographed kissing model Lexi Wood.

Ruth Negga and Dominic Cooper

Dominic Cooper and Ruth Negga in 'Preacher'

Courtesy of Skip Bolen/AMC

Preacher co-stars Ruth Negga and Dominic Cooper parted ways in the spring after eight years together. They have since appeared together for interviews and the show's season three premiere. Negga, in an interview with Marie Claire, referred to Cooper as her "best friend," and said the two of them had been broken up for a while and that the press "found out a couple of years too late."

Elon Musk and Amber Heard

Amber Heard and Elon Musk

Paul Archuleta/FilmMagic; Pascal Le Segretain/Getty Images

Aquaman actress Amber Heard confirmed the end of her yearlong relationship with Tesla CEO Elon Musk on Instagram in August.

"Being in the public eye means having to explain yourself to so many people, so much of the time. In this case, I'd like to remain more quiet. Although we have broken up, Elon and I care deeply for one another and remain close," she wrote. Musk reiterated that they still remained friends in a comment.

Heard toldTHR that Musk first reached out to her when she was still with Johnny Depp on the set of 2012's Machete Kills. They bonded over "intellectual curiosity, ideas and conversation (and) a shared love for science."

Ben Affleck and Lindsay Shookus

Ben Affleck and Lindsay Shookus

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Ben Affleck paired up with Saturday Night Live producer Lindsay Shookus shortly after his wife of 12 years, Jennifer Garner, filed for divorce. He was seen accompanying Shookus to the 2017 Emmys, but the couple split in August due to Affleck's ongoing struggles with addiction, a source told People.

Robert De Niro and Grace Hightower

Robert De Niro and Grace Hightower

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After 20-plus years together, Robert De Niro and Grace Hightower confirmed their split in November. De Niro previously filed for divorce in 1999, but the couple renewed their vows in 2004 — he first met Hightower when she was working as a hostess at Mr. Chows in London.

"Grace and I have two beautiful children together. We are entering a period of transition in our relationship which is a difficult but constructive process," said De Niro in a statement to THR. "I honor Grace as a wonderful mother and ask for privacy and respect from all as we proceed to develop our roles as partners in parenting."

Ariana Grande and Pete Davidson

Pete Davidson and Ariana Grande

Instagram/Ariana Grande

Ariana Grande and Pete Davidson's whirlwind romance began in May, culminated in an engagement in June and ended just this past October. The singer even named a song off her Sweetener album after Davidson.

Sources told TMZ that the couple's decision was mutual and that they agreed the timing wasn't right. After the death of her ex-boyfriend Mac Miller and the terrorist attack at her 2017 Manchester concert, Grande has stressed her need to heal: "can i pls have one okay day. just one. pls," she tweeted.

However, in December when Davidson posted a concerning message on his now-deleted Instagram account, stating that he doesn't "want to be on this Earth anymore,” Grande responded on Twitter: "I'm downstairs and I'm not going anywhere if you need anyone or anything. I know u have everyone u need and that's not me, but i'm here too."

Cardi B and Offset

Cardi B and Offset

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"Bodak Yellow" rapper Cardi B announced in December via Instagram video that she and her husband of one year, Offset, had split. The two share a child, Kulture Kiari.

"I guess we grew out of love but we are not together anymore," she said in the video. "I don’t know, it might take time to get a divorce and I’m going to always have a lot of love for him because he is my daughter’s father."

Shortly after, however, the Migos rapper tried to publicly make amends by showing up on stage during Cardi B's set at Rolling Loud, presenting her with a floral arrangement that spelled out, TAKE ME BACK, CARDI. Visibly uncomfortable, Cardi B spoke briefly and inaudibly with Offset before he left, addressing the incident later in an Instagram post: "Violating my baby father is not going to make me feel any better, because at the end of the day, that's still family," she told her followers.